Blowpipe.



PATENTED MAR. 24, 1908.

G. CLAUDE. BLOW'PIPB. APPLICATION FILED DEQ.27, 1906.

I ally difficult to solder iron. .15 which forms the object of the present invention permits of overcoming this difficulty;

' branch pipe from the I temperature of the .r'iame is noticeab y raised; '30 the incandescence and then thefusiou of the pieces of metal being treated are consider I gases secs-ere orifice, or rims, FRANCE.

ELEFWPIEPE No. asase'r.

Speifi'cafinn of Letters Patent.

Application filed December 27, 1996. Serial No. 349,737.

Patented. March 24, 1908. l

' To all whom it may concern:

Be it known that i? Grosses CLAUDE, a

citizen of the Republic of France, and resident of 43 Rue St. Lazare, Paris, France,

'5 have invented improvements in Blo'wpipes,

of which the following is a specification.

. As is known at. the present time there is no difficulty in eil'ecting the autbgenous soldering of the refractory metals and especially of iron and its derivatives by means of the oxy acetylenic or oxhydric blow pire. On the other hand if the acetylene or tne hydrogen are replaced by illuminating gas it is gener- The process It consists in raising the temperature of the flame by. heating the mixture of oxygen and combustible gas before the ignition. It

eddies been found to be possiblenotwithstand ing' the presence of the oxygen'to heat it "some hundreds of degrees without causing its premature and explosive combustion. The mixturemay be subjected for example due ing its passage; through the tube conducting it to the nozzle, to the action of a row of gas jets supplied by an appropriately regulated low-pipe su ply, the

ably accelerated; further, the preliminary heating oi tne gaseousmixture eernuts of producing between the oxy en and the com- 5 bustible gas an intimate and pertect mixture whereby it becomes ossibleto obtain conditions favorable-to e ciertt selderimg. This favorable circumstance which has great tecl meal-importance cannot be attained by heatthe oxygen and the combustible "as separately; :the latter may be previous y subject'ed "the mixture and tne velocities of flow- I in place, We preliminary compression of the mediedby displacing it by the compressed o w acting on the principle of the Giilard injector. if necessary, mixture of the I 'may take place before theyenterthe' bloo pe.. This raising of theter'nperstures may aisobe employed in the case oi oxhydric or other blew-pipes th' a View of increasing the rapidity bf their action or of obtaining efiects GfQWiBQc-il they would ot erwise be in i to a'slight, pressure which facilitates lficiency in its pressure may be heated to a White red, a et of oxygen sent on 100 capable; further, water gas, petroleum vaper and similar combustibles may be employed in the place ofilluminating gas. K

Figure 1 illustrates a, section through a blow-pipe and shows by way of example a method of carrying theciple of the invention into practice. [he oxygen entem this blow-pipe through the tube A, which is prolonged into the hollow handle'P by the tube E. This tube ends in a conical tube F and the centering washer M provided with holes N provides for its support. The combustible gas enters through the tube B provided with a cock O and traverses the chamber D concentric with E; it thenpasses throu h the holes N after Which'it is carried along y the current of oxygen which issuing from F with a high velocity acts in the mannor of a Gifi'ard injector'and carries the combustible gas along. 111 the part G which presents a'restriction the gases owi to the diminution of the cross-section for t eir flow. acquire a high velocity which enables them to mix. ,The mixture then traverses the tube H arid the chamber I at the upper part of which a hole K is formed; the gaseous so mixture issuin at K' is kindled and the flame thus pro uced permits of heating the different convolutions of the serpentine coil L and consequently-the mixture of uses which traversesthis coil on leaving the c amher I; this arrangement permits of raising the temperature of the m xture of the combustible and conburent gases before they are kindled on issuing from the nozzle B. This preliminary heating of the gaseous mixture renders it ossible to obtain technical effects for the'so daring which it is impossible to secure with ordinary blowpipes ,in which illuminatin gas, water, as, petroleum essenses, or tlie like are ut' 'zed as combustible gases. Finally another technical effect which the raising of the temperature renders it ossible to obtain may be pointed out. It is linown that when a piece of iron has been to its surface revokes a combustion thereon the iron. burning with such intensity that the metal fuses rapidly beneath the jet, and it is possible to cast, out, or perforate pieces of metal of very large size. the initial increase of temperature of the metal has been obtained by an oxhydric or an oxymcetylenic blow-pipe, it is only neces- If; for example,

sary to out off the supply of the combustible" Having desoribed my invention I clizimgas as sem -as the heating has been effected, In a blow piipe adaptedfor using a mixture and all 3n 21.1011 Ho act nde w i a; gen on "auoom'bust i'ble] gasgja mixing 6 am e1"'-,---a ii1aii1 buiinerco imectdtherewith ""by"'21"CC iiBd tube and a supplemei tal burner part raised preliminarily to l t won epitodpwithoaid mixing chamber and somewimt extensive, a moment ()fill ttonlocated in proximity to said tube, said last 25 tion or a. inonwntm'y unoortainty in tho: "named humor boimg adapted to utilize a pm dir'ootion of tho jot will he suflioiem to cause. ition of the gaseous; mixture in heating the. L 0 the ct Iii-111a nu gases,s amssing-through said coiiedftubqflub m 3 o 1 found that "i t' ll 1 'b i phoamtion to oxygon of thfp i'lmll'iflllj h ing by moons of a portion of the l'ni i'u umishi li affix my signature 0 i 

